I've read similar stories about Doctor Who. Another show with a parade of difficult leading men.
They have to be the big swinging dick on the set, stealing lines, getting drunk, throwing scripts at peoples' heads and calling it "whippet shit." Until finally, one of the co-stars has had it. Louise Jameson is a famous case. Tom tried to bully her off the show. But she grew a spine and told him off in front of everyone. Only then did he show courtesy.
It's a big risk to take. Like, you would never stand up to a middle manager at your shitty-ass job. Nine times out of ten you'd be out on your ass.